共查询到19条相似文献,搜索用时 62 毫秒
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粱志坤 《计算技术与自动化》1997,16(3):26-29
本文介绍线性时变系统方程解的估计问题。根据系统方程系数矩阵A,给出一种方法找出方程解的上边界和下边界。而这种方法与方程的精确解是完全一致的。然后建立线性时变系统稳定性判据。 相似文献
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变系数线性模型参数的递推估计胡峰(西安卫星测控中心710043)关键词递推估计,最小二乘法,变系数线性模型1引言在工程数据的综合处理中,特别是在卫星及运载工具的动态目标跟踪与精密定位时自从Brown[‘’提出最佳弹道自校准估计(EMBET)技术以来,... 相似文献
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本文研究了非线性延迟积分微分方程线性多步法的渐近稳定性.证明了在约束网格下,带有复合求积公式A-稳定的线性多步法能够保持解析解的渐近稳定性.文章最后,数值试验验证了本文的结论. 相似文献
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研究了变系数偏微分方程的 Galerkin KPOD (Krylov Enhanced Proper Orthogonal Decomposition)模型降阶方法.首先基于Galerkin有限元理论建立变系数偏微分方程的空间离散格式,得到具有时变系数矩阵的常微分方程组,并对该常微分方程组应用KPOD模型降阶方法进行降阶并求解.其次,对降阶投影算子进行了分析,给出了 Galerkin有限元解与Galerkin KPOD降阶解之间的误差界.最后用数值算例验证了变系数偏微分方程的Galerkin KPOD模型降阶求解方法的可行性,通过有限元离散解与Galerkin KPOD降阶解、Galerkin POD降阶解之间的误差比较,体现Galerkin KPOD降阶方法的优势. 相似文献
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线性时变系统的区间稳定性和鲁棒稳定性 总被引:7,自引:0,他引:7
用矩阵测度研究了线性时变系统的区间稳定性和具有非线性时变摄动的线性时变系统的鲁棒稳定性,得到了它们稳定的判别准则,所得结果与文[1~5]的结果互不包含. 相似文献
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将线性θ-方法用于求解R(α,β1,β2,γ)类非线性中立型延迟积分微分方程,结果表明A-稳定的线性θ-方法(也即1/2≤θ≤1)是渐近稳定的,最后的数值试验验证了所获理论结果的正确性. 相似文献
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线性切换系统的矩阵系数多项式描述模型 总被引:3,自引:0,他引:3
针对线性切换系统,提出一种新的数学模型-矩阵系数多项式技术模型。该模型能够更简洁地描述系统,实现自治线性切换系统的仿真。 相似文献
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This paper describes a new robust model predictive control (MPC) scheme to control the discrete‐time linear parameter‐varying input‐output models subject to input and output constraints. Closed‐loop asymptotic stability is guaranteed by including a quadratic terminal cost and an ellipsoidal terminal set, which are solved offline, for the underlying online MPC optimization problem. The main attractive feature of the proposed scheme in comparison with previously published results is that all offline computations are now based on the convex optimization problem, which significantly reduces conservatism and computational complexity. Moreover, the proposed scheme can handle a wider class of linear parameter‐varying input‐output models than those considered by previous schemes without increasing the complexity. For an illustration, the predictive control of a continuously stirred tank reactor is provided with the proposed method. 相似文献
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This paper deals with the problem of rubost stability for the uncertain neutral system with interval time varying discrete delay. By defining an appropriate Lyapunov‐Krasovskii functional and by employing the developed free weight matrices technique, several less conservative sufficient conditions are derived in term of the linear matrix inequalities. Numerical examples are given to demonstrate the effectiveness and the feasibility of the proposed method. Copyright © 2010 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society 相似文献
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Rigoberto Medina 《国际强度与非线性控制杂志
》2013,23(13):1496-1509
》2013,23(13):1496-1509
We give sufficient conditions for the exponential stability of a class of perturbed time‐varying difference equations with multiple delays and slowly varying coefficients. Under appropriate growth conditions on the perturbations, combined with the ‘freezing’ technique, we establish explicit conditions for global exponential stability. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
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This paper discusses the problems of the delay‐dependent robust stability and stabilization of uncertain neutral systems with time‐varying delays. Delay‐dependent stability criteria are derived by taking the relationships between the terms in the Leibniz‐Newton formula into account. Free‐weighting matrices are employed to express these relationships, and they are easy to obtain because the new criteria are based on linear matrix inequalities. Moreover, the stability criteria are extended to the design of a stabilizing state feedback controller. Numerical examples demonstrate that these criteria are effective and are an improvement on previous ones. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society 相似文献
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This paper investigates the quadratic stability and stabilization of a class of matrix second‐order time‐varying systems. All the system matrices including the second‐order differential coefficient matrix are assumed to have the time‐varying norm‐bounded parameters. Necessary and sufficient conditions for the quadratic stability and stabilization of such time‐varying systems are derived. All the results are obtained in terms of linear matrix inequalities. Two illustrative examples are given to show that our results are effective and less conservative than the results obtained by other researchers. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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本文研究了一类有非线性时变随机时滞的线性不确定系统的鲁棒稳定性.其中时变随机时滞表征为伯努利随机过程,具有已知的概率分布和变化范围.通过构造新泛函,建立了基于线性矩阵不等式的鲁棒均方指数稳定的充分条件,此条件易于用MATLABH2具箱来验证.本文所获得结果的主要特征是稳定性条件依赖时滞的概率分布和时滞导数的上界.同时也证明了允许时变随机时滞的时滞比之传统的确定性时滞有更大的变化范围,因此我们的条件比确定性时滞更为保守.算例表明了文中所提方法的有效性. 相似文献
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针对一类线性参数变化(LPV)连续系统的故障检测问题,通过构造合适的输出观测器,获得残差生成器,并通过优化设计步骤,实现对干扰的有效抑制和对故障的灵敏检测。利用依赖参数的Lyapunov函数,在保证残差生成器稳定性的基础上,给出观测器存在的充分条件。应用投影定理,借助附加矩阵解除了基于参数的Lyapunov函数矩阵与系统矩阵的耦合,得到以线性矩阵不等式(LMI)形式表示的求解条件。对于参数变化系统,基于LMI的求解条件为无穷维问题,借助基函数和参数网格化方法,使其转变为可求解的问题。仿真结果表明,应用该方法可以在一定程度上抑制干扰,并能灵敏有效地实现故障检测。 相似文献